Verification Receipt CLI (stella proof receipt get/verify)

Module

Cli

IMPLEMENTED

Retrieve and verify verification receipts by proof bundle ID in text, JSON, or CBOR format for audit trail cryptographic proof.

Command Group: src/Cli/StellaOps.Cli/Commands/Proof/ReceiptCommandGroup.cs -- ReceiptCommandGroup (instance class with DI logger)
- Registered under stella proof receipt command tree
- Uses IReceiptGenerator for receipt retrieval (integration pending)
Exit Codes: Defined in src/Cli/StellaOps.Cli/Commands/Proof/ProofExitCodes.cs -- ProofExitCodes.Success, SystemError, VerificationFailed
Commands:
- stella proof receipt get <bundleId> [--output text|json|cbor] -- retrieve verification receipt by proof bundle ID
- stella proof receipt verify <receiptFile> [--offline] -- verify a stored receipt file (DSSE signature, ProofBundleID recomputation, optional Rekor inclusion)
Verification Steps (planned):
1. Load receipt from file
2. Verify DSSE signature on receipt
3. Recompute ProofBundleID from claims
4. Optionally verify Rekor inclusion (skipped in --offline mode)

Run stella proof receipt get <bundleId> and verify text output showing Bundle ID and receipt details
Run stella proof receipt get <bundleId> --output json and verify valid JSON with proofBundleId field
Run stella proof receipt get <bundleId> --output cbor and verify CBOR-encoded output
Run stella proof receipt verify ./receipt.json and verify signature and Rekor verification
Run stella proof receipt verify ./receipt.json --offline and verify offline mode skips Rekor check
Run stella proof receipt verify ./nonexistent.json and verify error: "Receipt file not found"
Verify exit code 0 on successful verification, non-zero on failure